If you have been reading about research chemical and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
Regulatory treatment of SR9009 varies by country and region. It is not approved as a pharmaceutical, and several jurisdictions restrict its sale for human consumption. Some authorities classify it as a research chemical, a prescription-only substance, or a prohibited performance-enhancing agent in sport. Purchasers may encounter certificates of analysis, but these documents do not guarantee identity, purity, or legality. In research settings, institutional safety reviews and controlled procurement help ensure that materials are handled under appropriate oversight. The absence of harmonized rules means that legal status can change and requires verification.
Analytical identification of SR9009 typically relies on liquid chromatography coupled with tandem mass spectrometry. In biological samples, researchers first separate the compound from matrix components using protein precipitation, liquid-liquid extraction, or solid-phase extraction. High-performance liquid chromatography with ultraviolet detection and nuclear magnetic resonance spectroscopy can support structural confirmation of reference materials. Because SR9009 is a small, relatively lipophilic molecule, reverse-phase columns and acidic mobile phases are common. Laboratories often include isotope-labeled internal standards to improve quantification and to correct for ion suppression.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | SR9009; Stenabolic | Nickname is not a chemical name. |
| Typical analytical method | LC-MS/MS | Often with isotope-labeled internal standard. |
| Storage temperature | -20 °C | Desiccated and protected from light. |
| Solution stability | DMSO stock; avoid freeze-thaw | Store at -20 to -80 °C. |
| Regulatory status | Not approved; varies by country | May be restricted as research chemical. |
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
== Y == Yam – indigenous Americans in the Guyana region of South America domesticated the most important New World yam: D. Trifada Yucca – the plant was cultivated throughout the Americas, and is mostly distributed in coastal lowlands and dry beach scrub of coastal areas.
==== MeSH D13.444.735 – rna ==== MeSH D13.444.735.130 – rna, algal MeSH D13.444.735.150 – rna, antisense MeSH D13.444.735.150.319 – micrornas MeSH D13.444.735.150.640 – oligoribonucleotides, antisense MeSH D13.444.735.150.700 – rna, small interfering MeSH D13.444.735.300 – rna, archaeal MeSH D13.444.735.473 – rna, bacterial MeSH D13.444.735.476 – rna, chloroplast MeSH D13.444.735.480 – rna, complementary MeSH D13.444.735.490 – rna, double-stranded MeSH D13.444.735.500 – rna, fungal MeSH D13.444.735.520 – rna, helminth MeSH D13.444.735.544 – rna, messenger MeSH D13.444.735.544.355 – codon MeSH D13.444.735.544.355.225 – codon, initiator MeSH D13.444.735.544.355.250 – codon, terminator MeSH D13.444.735.544.355.250.235 – codon, nonsense MeSH D13.444.735.544.500 – rna caps MeSH D13.444.735.544.500.710 – rna cap analogs MeSH D13.444.735.544.527 – rna, messenger, stored MeSH D13.444.735.544.550 – rna splice sites MeSH D13.444.735.544.875 – untranslated regions MeSH D13.444.735.544.875.880 – 3' untranslated regions MeSH D13.444.735.544.875.885 – 5' untranslated regions MeSH D13.444.735.615 – rna, neoplasm MeSH D13.444.735.628 – rna, nuclear MeSH D13.444.735.628.806 – rna, heterogeneous nuclear MeSH D13.444.735.628.818 – rna, small nuclear MeSH D13.444.735.628.818.800 – rna, small nucleolar MeSH D13.444.735.635 – rna, plant MeSH D13.444.735.635.575 – rna, chloroplast MeSH D13.444.735.640 – rna precursors MeSH D13.444.735.650 – rna, protozoan MeSH D13.444.735.686 – rna, ribosomal MeSH D13.444.735.686.650 – rna, ribosomal, 5s MeSH D13.444.735.686.660 – rna, ribosomal, 5.8s MeSH D13.444.735.686.670 – rna, ribosomal, 16s MeSH D13.444.735.686.675 – rna, ribosomal, 18s MeSH D13.444.735.686.680 – rna, ribosomal, 23s MeSH D13.444.735.686.690 – rna, ribosomal, 28s MeSH D13.444.735.686.845 – rna, ribosomal, self-splicing MeSH D13.444.735.721 – rna, satellite MeSH D13.444.735.721.250 – cucumber mosaic virus satellite MeSH D13.444.735.757 – rna, transfer MeSH D13.444.735.757.286 – anticodon MeSH D13.444.735.757.700 – rna, transfer, amino acid-specific MeSH D13.444.735.757.700.050 – rna, transfer, ala MeSH D13.444.735.757.700.075 – rna, transfer, arg MeSH D13.444.735.757.700.085 – rna, transfer, asn MeSH D13.444.735.757.700.090 – rna, transfer, asp MeSH D13.444.735.757.700.200 – rna, transfer, cys MeSH D13.444.735.757.700.400 – rna, transfer, gln MeSH D13.444.735.757.700.410 – rna, transfer, glu MeSH D13.444.735.757.700.420 – rna, transfer, gly MeSH D13.444.735.757.700.450 – rna, transfer, his MeSH D13.444.735.757.700.480 – rna, transfer, ile MeSH D13.444.735.757.700.500 – rna, transfer, leu MeSH D13.444.735.757.700.510 – rna, transfer, lys MeSH D13.444.735.757.700.525 – rna, transfer, met MeSH D13.444.735.757.700.650 – rna, transfer, phe MeSH D13.444.735.757.700.660 – rna, transfer, pro MeSH D13.444.735.757.700.700 – rna, transfer, ser MeSH D13.444.735.757.700.725 – rna, transfer, thr MeSH D13.444.735.757.700.740 – rna, transfer, trp MeSH D13.444.735.757.700.750 – rna, transfer, tyr MeSH D13.444.735.757.700.900 – rna, transfer, val MeSH D13.444.735.757.715 – rna, transfer, amino acyl MeSH D13.444.735.790 – rna, untranslated MeSH D13.444.735.790.099 – micrornas MeSH D13.444.735.790.149 – regulatory sequences, ribonucleic acid MeSH D13.444.735.790.199 – rna, catalytic MeSH D13.444.735.790.400 – rna, guide MeSH D13.444.735.790.530 – rna, small cytoplasmic MeSH D13.444.735.790.537 – rna, small interfering MeSH D13.444.735.790.545 – rna, small nuclear MeSH D13.444.735.790.545.800 – rna, small nucleolar MeSH D13.444.735.790.560 – rna, spliced leader MeSH D13.444.735.790.878 – untranslated regions MeSH D13.444.735.790.878.880 – 3' untranslated regions MeSH D13.444.735.790.878.885 – 5' untranslated regions MeSH D13.444.735.828 – rna, viral
== Structure == The 3D structure of human serum albumin has been determined by X-ray crystallography to a resolution of 2.5 ångströms (250 pm). Albumin is a 65–70kDa protein. Albumin comprises three homologous domains that assemble to form a heart-shaped protein. Each domain is a product of two subdomains that possess common structural motifs. The principal regions of ligand binding to human serum albumin are located in hydrophobic cavities in subdomains IIA and IIIA, which exhibit similar chemistry. Structurally, the serum albumins are similar, each domain containing five or six internal disulfide bonds.
This success was enough for him to take over the No. 1 ranking in late October. Before the end of the season, Zverev also represented Germany in the Junior Fed Cup, leading them to a fourth-place finish. His last tournament of the year was the Grade A Orange Bowl, where he was defeated by Stefan Kozlov in the semifinals. As the top-ranked junior at the end of the season, he was named the ITF Junior World Champion, becoming the youngest boys' champion since Donald Young in 2005. Zverev played just two tournaments in 2014, both in Australia in January. He won the singles events at both tournaments, the first of which came against Australian Omar Jasika at the Traralgon Junior International. At the Australian Open, he was able to defeat Kozlov, who was seeded second, to finish his junior career with a first major title. Junior Grand Slam results – Singles: Australian Open: W (2014) French Open: F (2013) Wimbledon: 3R (2013) US Open: SF (2013)
Sources: en.wikipedia.org
The most common symptom of a spinal CSF leak is a fast-onset, extremely painful orthostatic headache. This headache is usually made worse by standing and typically becomes prominent throughout the day, with the pain becoming less severe when lying down. Orthostatic headaches can become chronic and disabling to the point of incapacitation. Some people will develop headaches that begin in the afternoon. This is known as second-half-of-the-day headache. This may be an initial presentation of a spontaneous CSF leak or appear after treatment such as an epidural patch, and likely indicates a slow spinal CSF leak. While high CSF pressure can make lying down unbearable, low CSF pressure due to a leak can be relieved by lying flat on the back. About 50% of people with a spinal CSFL experience neck pain or stiffness, nausea, and vomiting. Other symptoms of a CSF leak include photophobia, dizziness and vertigo, gait disturbances, tinnitus, facial numbness or weakness, visual disturbances, brain fog or difficulties with concentration, neuralgia, fatigue, fluid dripping from the nose or ears. Aural symptoms are also present in many cases of intracranial hypotension due to CSF leak; including muffled hearing, pulsatile tinnitus, hearing loss. Less common symptoms include double vision (due to cranial nerve 6 palsy) or tremor. Movement disorders are uncommon in spontaneous CSF leaks but occasionally can be one of the major components of the clinical presentation.
==== Restless legs syndrome ==== Sleep medicine physicians sometimes prescribe tramadol (or other opioid medications) for refractory restless legs syndrome (RLS); that is, RLS that does not respond adequately to treatment with first-line medications such as dopamine agonists (e.g., pramipexole) or gabapentinoids, often due to augmentation.
== Sierra Leone == Amadu Wurie - Educationist and politician, First Minister of Education and later Minister of Interior of Sierra Leone Sir Banja Tejan-Sie - Politician and lawyer. former vice president under SLPP (1953–1956), former chief justice and Governor-General of Sierra Leone Mohamed Juldeh Jalloh – Current vice president, Republic of Sierra Leone Abass Bundu – Current Speaker of Parliament Sierra Leone, former minister of foreign affairs, former Executive Secretary of the Economic Community of West African States Ibrahim Bundu - former majority leader of the Sierra Leone Parliament, Sierra Leone Abdulai Hamid Charm - former chief justice, Sierra Leone Umu Hawa Tejan-Jalloh – former chief justice, Diplomat, Sierra Leone Miatta Maria Samba - Sierra Leonian jurist and current judge at the International Criminal Court (ICC). Sulaiman Tejan-Jalloh – politician and Diplomat, former Minister of Transport and Communications and former ambassador to US, Sierra Leone Neneh Cherry (birth name Neneh Mariann Karlsson) – Singer-songwriter, rapper, occasional DJ and broadcaster, Sweden Titiyo (birth name Titiyo Yambalu Felicia Jah) – singer and songwriter, Sweden Alpha Timbo – Politician, educationist, lecturer and trade unionist. Minister of Primary and Secondary Education, former Minister of Labor and Industrialization, Sierra Leone Chernor Bah - Minister of Information and Civic Education Chernor Maju Bah – lawyer and politician.
Sources: en.wikipedia.org
The most common approach is liquid chromatography-tandem mass spectrometry, often after extraction from blood, urine, or tissue. Ultraviolet detection and nuclear magnetic resonance spectroscopy are used mainly for reference material characterization. Isotope-labeled internal standards improve accuracy.
Solid material is usually kept at -20 °C, desiccated, and protected from light. Dimethyl sulfoxide stocks should be stored cold and subjected to minimal freeze-thaw cycles. Aqueous solutions are generally less stable and should be prepared fresh when possible.
Legality depends on the country and the intended use. It is not an approved medicine, and some places restrict or ban sales for human consumption. Buyers should verify local rules and product documentation before procurement.
Legality depends on the country and the intended use. In many places it is sold as a research chemical, but sports and medicine regulations restrict it.